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›› 2012, Vol. 12 ›› Issue (6): 917-924.

• 流动与传递 • Previous Articles     Next Articles

Statistical Characteristics of Taylor Bubbles in Cryogenic Gas-Liquid Slug Flow?I. Taylor Bubble Length

LIU Yi-peng ZHAO Xian-lin WANG Ping-yang LIN Shuai-nan DU Zhao-hui   

  1. School of Mechanical Engineering, Shanghai Jiao Tong University Department of Physics, Henan Institute of Education School of Mechanical Engineering, Shanghai Jiao Tong University School of Mechanical Engineering, Shanghai Jiao Tong University School of Mechanical Engineering, Shanghai Jiao Tong University
  • Received:2012-10-18 Revised:2012-11-23 Online:2012-12-20 Published:2012-12-20
  • Contact: LIU Yi-peng

低温气液两相弹状流动中Taylor气泡的统计特征?I. Taylor气泡长度

刘亦鹏 赵先林 王平阳 蔺帅南 杜朝辉   

  1. 上海交通大学机械与动力工程学院 河南教育学院物理系 上海交通大学机械与动力工程学院 上海交通大学机械与动力工程学院 上海交通大学机械与动力工程学院
  • 通讯作者: 刘亦鹏

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Abstract: The effects of inclination angle (q) and tube inner diameter on the Taylor bubble length in cryogenic gas-liquid slug flow were experimentally studied using high speed digital camera within four different test tubes under six different inclination angles. The results show that the length distribution of cryogenic Taylor bubbles fits to lognormal function. The standard deviation of Taylor bubble length is influenced by the jet from liquid film. It increases first and then decreases with the decrease of q. The mean value of dimensionless Taylor bubble length linearly increases with the increase of the tube axial position, and gradually decreases with the increase of tube inner diameter. The linear and exponential functions give satisfactory fitting results. Overall the dimensionless Taylor bubble length increases with q, and its minimum value occurs in the region of 70o≤q≤90o.

Key words: cryogenic gas-liquid two-phase flow, slug flow, visualization, Taylor bubble, bubble length

摘要： 为了研究倾角(q)和管径对低温气液两相流中Taylor气泡长度分布规律的影响，在6种管路倾角下，以液氮为工质，使用高速相机对4种内径透明抽真空Pyrex玻璃管内的弹状流动进行了可视化实验. 结果表明，低温弹状流动中Taylor气泡长度分布的统计特征可由对数正态分布函数描述，Taylor气泡长度分布的标准偏差受到液膜射流直接影响，并随q减小先增大后减小. Taylor气泡无量纲平均长度随管路轴向位置增大而线性增加，随管路内径增加呈指数下降趋势，随q减小而增大，最小值出现在70o≤q≤90o.

关键词: 低温气液两相流, 弹状流, 可视化实验, Taylor气泡, 气泡长度

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